Default Schedule Direction

In Job entry for Schedule Direction, I am trying to make it default
to forward. I do not know how to change the properties for radio
buttons when two buttons are linked to one field. The two form fields
are radForward and radBackward.
I thought I could simply use
Private Sub ScheduleForm_Load(ByVal sender As object, ByVal args As
EventArgs) Handles ScheduleForm.Load
radBackward.Checked = False
radForward.Checked = True
but it does not seem to work like that. It seems it should be simple
but I am not a programmer. Any Ideas?